Vent plug



FIG. 1 is an isometric view of a vent plug in accordance with the present invention;

FIG. 2 is a side elevational view of the vent plug of FIG. 1;

FIG. 3 is a top plan view of the vent plug of FIG. 1; and,

FIG. 4 is a bottom plan view of the vent plug of FIG. 1. 

CLAIM The ornamental design for a vent plug, as shown and described. 